Metallic fumes



i (No Model.)

- D. SHBEDY & M. W. ILES.

DEVICE FOR COLLECTING METALLIC FUMES. No. 483,176;

Patented Sept. 27, 1892.

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DENNIS SHEEDY AND MALVERN ILES, OF DENVER, COLORADO.

DEVICE FOR COLLECTING METALLIC FUMES.

SPECIFICATION forming part of Letters Patent No. 483,176, datedSeptember 27, 1892.

Application filed December 8, 1891. serial No. 414,539. (No model.)

To all whom it may concern.-

Be it known that we, DENNIS SHEEDY and MALVERN WV. km, of the city ofDenver, county of Arapahoe, and State of Colorado, have invented acertain new and useful Device for Collecting Metallic Fumes, of whichthe following isa true and exact description, reference being had to theaccompanying drawings, which form a part of this specification.

Our invention relates to a device for separating and saving the solidmatter driven off from metallurgical furnaces, together with the gaseousproducts of combustion.

The object of our invention is to provide a simple, efficient, and atthe same time economical device for effecting this result, and we maymention here that our device is of especial value for use in connectionwith roasting-furnaces.

The nature of our invention will be best understood as described inconnection with the drawings in which it is illustrated, and in whichFigure 1 is a longitudinal cross-section throughthe roasting-furnace andthrough the conduits, including the stack by which the smoke, &c., istaken from the furnace. Fig. 2 is a plan view of one of the screenswhich we employ. Fig. 3 is a cross-sectional view of the screen on theline 3 4 of Fig. 2. Fig. 4 is a cross-sectional view on the line 5 6 ofFig. 3; Fig. 5, a cross-sectional view taken through the stack on theline 1 2 of Fig. l.

A indicates the furnace; B B B, a conduit, or dust-flue, as it issometimes called, leading from the furnace to the stack B The length ofthe conduit B B B would vary in practice according to the conditions ofuse, the part near the furnace being arranged to serve as a coolingdevice, so that the products of combustion, &c., will not besufficiently hot to destroy the screens, which will be hereinafterdescribed.

0 indicates a wall,which divides the domelike portion of the conduit Binto two vertical parts.

D indicates the dustchamber situated at the bottom of the stack B Ebeing a hopper for catching the dust, and F a car beneath the hopper forcarrying the dust away.

At convenient intervals narrow openings G stack, doors 9 being providedfor closing them.

I I, &c., indicate screens, which are made up of mats or mat-like massesof fibrous material, secured in a frame J, which is adapted to beinserted in the openings G and to extend transversely across theconduit. The mat of fibrous material may consist of straw, dried grass,or, in fact, any material which when placed loosely together will formapernleable screen, and for certain purposes I have found it advisableand convenient to make up the mat of a mass of lead fiber-- that is tosay, of very fine lead wire matted loosely together.

The fibrous mat indicated by the letter L is most conveniently held inplace on the trays J by means of two rows of slats or wires K K, &c.,between which the mat is placed.

The screens we use in the stack B are preferably pivoted therein, asshown in Fig. 5, in which M M represent the journals on which the screenis pivoted. The end m of the journal M extends through the stack, sothat it may be seized and the screen turned to a vertical position. Thisarrangement is desirable, so that any accumulated dust can be dumpedfrom the screen into the dustchamber B.

We are aware that it is not new with us to effect a separation of thesolid particles from the products of combustion in metallurgicalfurnaces by means of screens, which have been heretofore made in variousways, the most useful being by the use of a woven fabric.

The essential feature of our invention consists in the use of the mattedmass of fibrous material, which makes up a screen of quite a differentcharacter and enables us to use cheaper material.

Our screens are readily removable, so that whenever one becomes injuredor clogged it can be readily removed and another inserted, the defectivescreen being repaired by taking out the matted fiber and replacing itwith a fresh mat.

Having now described our invention, what We claim as new, and desire tosecure by Letters Patent, is-=- l. Dust-screens having, in combination,a frame J, two rows of rods or wires K K, and a G, &c., are formed inthe smoke-conduit and mat of fibrous material held between the two rowsof rods or wires, substantially as and for the purpose specified.

2. In combination with a metallurgicalfurnace and a fume-conduit leadingtherefrom, a series of removable dust-screens set across said conduitand formed of a mat-like mass of fibrous material held in a frame byslats or bars, substantially as and for the purpose specified.

3. In combination with a metallurgical furnace, a f ume-conduit leadingtherefrom, openings G in said conduit-doors g for closing the same, andremovable screens arranged to enter said openings G and formed of afibrous mat held in place by slats or Wires, substantially as and forthe purpose specified.

as and for the purpose specified.

DENNIS SHEEDY. 'MALVERN W. ILES.

Witnesses:

J. H. TUCKER, EDWIN N. HAWKINS.

